i7 990 6 cores, only shows 4 cores

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soldano

Member
Jun 17, 2005
139
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I recently upgraded from a i7 960 4 core to a i7 990X 6 core.- I flashed my Asus P6X58DE motherboard with the latest bios 0701 (which according to Asus supports the 990X), enabled all cores at the setup, and at the POST the 990X is recognized, but it happens that either in the task manager or other testing aplications, only 4 cores are recognized.-
What wrong is happening ?
Thanks
 
SpeedTester

SpeedTester

Senior member
Mar 18, 2001
995
1
81
Is it showing 8 threads or 4? Double check advanced options in msconfig to make sure your max processors isn't set to a specific number.
 
K

Kenmitch

Diamond Member
Oct 10, 1999
8,505
2,250
136
It could be the ghost of i7 960 past. Sometimes an old cpu will linger in the registry/device manager and haunt you. I know sometimes going from no hyperthreading to hyperthreading it sometimes works to clean out the old cpu to get hyperthreading to work. Not sure if it'll clear out your core situation or not.

You just need to follow these steps exactly to get rid of the old cpu.

Type cmd in search then right click and choose run as administrator

Then input the following command enter after each one. You can cut and paste them.

set devmgr_show_nonpresent_devices=1

start devmgmt.msc

Then in device manager select the following from the drop down menu

View > Show Hidden Devices

Go to the Processors and open. You should see your old cpu remove all instances of it. Close device manager and reboot the system.
 
podspi

podspi

Golden Member
Jan 11, 2011
1,982
102
106
Did you reinstall Windows, or are you using your old install? I've heard of this happening before when people just try using their old install.


As others have said, try reinstalling your CPU drivers and/or msconfig options. If all else fails, reformat! That is what I would do anyway :D
 
H

Hyonie

Senior member
Jul 19, 2003
218
0
71
I would try the msconfig options as well. If you messed with the boot options in the advanced config, it might be it.
 
S

soldano

Member
Jun 17, 2005
139
0
0
Kenmitch said:
It could be the ghost of i7 960 past. Sometimes an old cpu will linger in the registry/device manager and haunt you. I know sometimes going from no hyperthreading to hyperthreading it sometimes works to clean out the old cpu to get hyperthreading to work. Not sure if it'll clear out your core situation or not.

You just need to follow these steps exactly to get rid of the old cpu.

Type cmd in search then right click and choose run as administrator

Then input the following command enter after each one. You can cut and paste them.

set devmgr_show_nonpresent_devices=1

start devmgmt.msc

Then in device manager select the following from the drop down menu

View > Show Hidden Devices

Go to the Processors and open. You should see your old cpu remove all instances of it. Close device manager and reboot the system.
Click to expand...

Thanks Kenmitch
The device manager previously showed 5 instances of my 990, I followed your instructions, and ended with several instances of an unknown device and of my former 960, which I all uninstalled, after rebooting nothing changed, the task manager showed 4 cores and the device manager 5 instances of the 990.- Then I enabled HT at the setup, and now I have 10 instances of the 990 at the device manager and 4 cores at the task manager.-
I tried disabling the procesors quantity at the msconfig/start/advanced menu, but it returns always to 4 each time I reboot.-
 
Puppies04

Puppies04

Diamond Member
Apr 25, 2011
5,909
17
76
Where did you buy the 990 from? If it was from a shady guy in an alley and has 990 written on it in marker pen I think I know what happened.
 
aigomorla

aigomorla

CPU, Cases&Cooling Mod PC Gaming Mod Elite Member
Super Moderator
Sep 28, 2005
21,084
3,588
126
reinstall windows...

sometimes people have this problem when upgrading to a processor with more cores.

Easiest solution is reinstall windows and see if you still have that problem.

If you do, then it has to do with VTT, and not feeding it enough VTT.
 
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